Improvement in quartz-mills



PATENT "i NITED STATES |MPRovEMENT iN QuARTz-MILLS.

Specification forming part of Letters Patent No. 183,583, dated October 24, 1876; application iiled August 17, i876.

To all 'whom it may concern:

' Be it known that I, DAVID D. MALLORY, of Mystic Bridge, in the county of New London and State of Connecticut, have invented certain new and useful Improvements Relating to Quartz-Mills, of which the following is a speciication My improved mill or machine acts on the principle of throwing the particles of uniform or differin g degrees offineness violently against eachpther as a means of crushing. v

It is a well-known law in mechanics that the destructive effect of impact is proportional not to the velocity simply, but to the square of the velocity. Thus, a particle striking another moving with the same velocity in the opposite direction will be shattered with four times the effect which would result from simply striking a fixed surface. The system is a valuable one, and has been many times referred to in patents, with various attempts to work it out to a practical success.

My invention is an improvement in mechanism for disintcgrating refractory material by that means.

I employ two or more rapidlywhirling wheels, provided with floats, and whirled, both or all, in the same direction. This, in addition to other advantages, facilitates the communication of power.

I make the interior of the casing something larger than is required to inclose the revolving wheels, and provide for accumulating a lining of the material within the casing, so that impacts, abrasion, and disintegration occurring between the violently-impelled particles and the inclosing walls shall be largely or entirely against a lining of similar particles.

I provide for an automatic separation of the coarser from the ner particles. They are borne away in the current of air escaping from my machine, the finer particles being carried away into a long chamber or settlingroom, and allowed to fall at their leisure, while the coarser particles are thrown out of the current by their momentum at an early period in the movement, and are again automatically introduced into the mill to he4 retreated.

The accompanying drawings form a part of this specification, and represent what I con- Sider the best means of carrying out the invention.

Figure lis a vertical section, showingpmy.l

and Fig. 2 is a side elevation on a apparatus,

certain parts being shown In smaller scale, section.

Similar letters of reference indicate corre-- sponding parts in both the figures.

A is a flxed casing. B1 B2 B3 Bt are shafts mounted in suitable bearings, well guarded against grit, and carrying wings or floats of chilled iron, or analogous material, as indicated.. These shafts are equipped with pulleys b] 112,850., which may bev each covered with. leather, rubber, or the like, to increase the adhesion to africtional drivin g-pulley, c, mounted on a shaft, O, which extends through an aperture inthe casing, as shown, and receives motion through a belt running on a smaller pulley, c', from a steam-engine or other power. (Not represented.)

The material is received through passages G, supplied with automatic regulation, or otherwise, from hoppers. (Not represented.) There is also a duct, g, communicating with 011e or each of these feed-passages, for bringing down coarser particles, if they have been thrown up, as will be detailed farther on.

The particles received at or near each shaft B1 B2, Svc., are thrown out by the centrifugal force, and may accumulate with more or less adhesion in the interior of the casing A, as indicated by a. These particles form a lining, which protects the interior of the casing A from destruction. Any wear or disintegration which is effected between the rapidlyrevolving particles and the xed particles is obviously no injury when the lining is constantly replaced. I provide for retaining the lining by means of fixed internal projections or wings A in the casing. I can furthermore promote the accumulation of particles by the use of eXtra heat, or other means for promoting the union of the particles.

The loose matter received through the passage G receives violent blows from the floats as itis whirled around,and, seeking to escape by virtue of its centrifugal force, it is thrown off tangentially, and meets a current in the opposite direction at each point in. The particles which escape` contact witheach other more pastthe point m, and' strike violently against the projecting iioato' another wheel. Under either condition the impact is violent, and the pulverizing effect is very rapid.

From one or more of the Winged` shafts B] represented.) VThe heavier particles, however,4 i

move out of? the current, and,arriving at a placewhere `the airiscomparatively quiet, sink rapidly down: into the space e', whence they fall,through a duct, g, into a passage, G, where they mingle with the freshon raw incoming material, and` arecarried .intothe mill my hand this 19th` day of July, 1876 in the to be isubjected anew `to the treatment.

I am aware that a cylinder with roughened f interior'and transverse flanges has beenbe.-

fore know-n inl4 grinding-mills, as shown inl l patent to J. A. Moore,No'.180,149, July 25,.

1876, and such I do not claim 5. but

substantially as and for the `specified.

l I claim as my improvement in quartz-crushinlg- A 1. The combination, with a suitable casing, A, of two or more wheels or beaters, B B2, 8vo., revolving in the same direction, and projecting the particles of matter tobecrushed in opposing streams meeting at the points m, substantially as and for the purposes herein specified".`

2. In combination with the two or mor wheels or beaters B B?, 85e., the inclosing casing A, having a ridged or roughened interior holding the lining a,of like material to that being treated, substantially as and for the purposes herein specified.

3. In combination with the` casing A, and

l two ovl-'umore` Wheels orbeateraBlB, revolving in the same` direction, the discharge-pas# sage c, separating-chamber Etandreturnpassagee, to assort the particles, and carry the coarser particles into` the` feed-passageG,

I n testimony whereof` I have hereunto `set presence of two subscribing.Witnesses.

DAVID` D. i MALLORY. Witnesses:

Gao. W.;MALLOB.Y, Si E. GRIsWoLD.

purposes herein 

